Dr Araújo is a Periodontist working both in private practice Rio de Janeiro and at The State University of Maringa, Parana, Brazil. He completed his PhD at The University of Gothenburg, Sweden in 1998. He is the Chairman of the Perio/Implant Research Unit, State University of Maringá. He has together with his co-workers published groundbreaking research in the fields of ridge alterations following tooth extraction, ridge preservation, bone formation in extraction sockets and immediate implant placement. He is an ITI Fellow, the former ITI Chairman in Brazil and an Osteology Foundation Board member. He is member of the editorial board of several journals.